Oh, yes, ex-smoker here too. I occasionally want one but it's few and far between... the hassle of being a smoker is not worth it. (the stink, the lung pain, the cough which got worse as I got older... and I'm only in my 30's... and no-one wants to be around you!)
I have quit many times...it's weird, I just had a dream that I was discussing this with someone... and it got harder and harder to quit. So if it was easy this time it doesn't mean it will be next time.
I would never flame you for missing smoking and wanting to go back to it honey! You did the right thing by quitting during pregnancy but I would encourage you to fight the urge to return to it. What about YOUR health... and second hand smoke for the baby, (even if you say you won't smoke around the baby there may come a time, as you become more and more dependent on it, that you may slip "just this once"...), living a longer life for your family (my DH lost his mom ten years ago to cancer and it was devastating.
Here's what helps me not want to smoke... anything that cleans out my system, like yoga (especially Bikram... something about the heat steams my lungs clean or something) and any kind of cardiovascular activity. And the longer I was quit for, the easier it got.
So if you quit when you got pg, you only quit about 8 or so months ago... at that point, I still really wanted to smoke. Maybe give it some more time for your body to heal... I know they say it takes three days for nicotine to leave your system but as any honest-to-god smoker knows, it takes a much longer time to really really let it go.
Sorry, hon, I just can't encourage you to go back to smoking. I would never judge you for it (like I said, I've smoked on and off a lot) but if you can help it, find ANYthing else for stress relief!
Just gotta say, though, I have craved ciggies during pregnancy. How weird! I guess I will always have the occasional pang, I just try to thing of all the negative things that go with it.
Don't pick it up!

It's tough.